@julian Yup, it is based on the latest version of your solr plugin from today.

As far as features are concerned, both are very comparable. Both are built to scale across multiple machines, although Elasticsearch is designed with its own clustering built-in while Solr is designed to work with Apache Zookeeper.

We already had a cluster of Elasticsearch servers and wanted to leverage that instead of having to deploy yet another cluster of Solr servers.

I've implemented Elasticsearch search plugin based on the nodebb-plugin-solr plugin. I saw that there was an older Elasticsearch plugin that was outdated, so instead I took the nodebb-plugin-solr code and adapted it, replacing the Solr code with Elasticsearch api calls.